CN115886705A

CN115886705A - Ureteroscope for operation capable of returning and discharging stones

Info

Publication number: CN115886705A
Application number: CN202111103946.7A
Authority: CN
Inventors: 单剑; 程跃; 陈卿业; 吴海良; 方立; 王路强; 黄俊俊; 李强
Original assignee: Ningbo First Hospital; Ningbo Xinwell Medical Technology Co Ltd
Current assignee: Ningbo First Hospital; Ningbo Xinwell Medical Technology Co Ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2023-04-04
Also published as: WO2023045769A1

Abstract

Disclosed is a ureteroscope for operation, which can discharge stones in a loop manner and comprises a scope main body and an operating part. The tube lens main part includes: the liquid injection device comprises a tube structure main body, at least one liquid injection channel and at least one liquid outlet channel, wherein the at least one liquid injection channel is provided with at least one liquid outlet positioned at the front end part, and the at least one liquid outlet channel is provided with at least one liquid inlet positioned at the front end part. In particular, the liquid outlet has a first orientation, and the liquid inlet has a second orientation which forms a preset included angle with the first orientation, so that the fluid emitted from the liquid outlet forms a loop in the renal pelvis and then flows back to the liquid inlet through the special posture combination of the liquid outlet and the liquid inlet, thereby improving the efficiency of leading out the crushed stone and preventing the fluid discharged from the liquid outlet from directly flowing into the liquid inlet without passing through the renal pelvis.

Description

Ureteroscope for operation capable of returning and discharging stones

Technical Field

The application relates to the field of medical equipment, in particular to a ureteroscope for operation, which can loop back to discharge stones.

Background

In recent years, ureteroscopes have been widely used for the treatment of urinary calculus diseases. Specifically, the ureteroscope can extend into a ureter or a kidney from a urethral orifice, and medical workers can observe the condition in the kidney by using the ureteroscope to cooperate with equipment such as image acquisition equipment and lighting equipment and break stones at a target position.

In practical application, in the process of beating the calculus through the ureteroscope, when the size of the calculus is larger, the calculus is difficult to be powdered after being smashed to a broken calculus with the equivalent diameter of about 2mm by the traditional ureteroscope, and the broken calculus is difficult to be led out of a patient body through an effective leading-out mechanism. Therefore, after the calculus is crushed by the traditional ureteroscope, 60% -90% of the crushed calculus remains in the kidney and is difficult to be discharged out of the body in time by a natural discharging mode, and the discharging rate of the crushed calculus is low. The residual broken stones may form a stone street in the ureter to block the ureter, and the broken stone residue is one of the main reasons causing high recurrence rate of stones.

To address this problem, ureteroscopy designs are proposed that are capable of removing the debris. In this design, the ureteroscope is provided with a rubble discharge mechanism to discharge the rubble in time to the outside of the body. However, the ureteroscope still has some problems in the practical application process, for example, the efficiency of calculus removing is low.

Therefore, a new ureteroscope design is needed to improve the efficiency of the calculus removal.

Disclosure of Invention

An advantage of the present application is to provide a ureteroscope for operation that can loop back to remove calculus, wherein the ureteroscope for operation that can loop back to remove calculus has a relatively high efficiency of calculus derivation.

Another advantage of the present application is to provide a ureteroscope for operation that can loop back and arrange stone, wherein, the liquid outlet and the income liquid mouth of ureteroscope for operation that can loop back and arrange stone have special position appearance combination to make the fluid that is gone out from the liquid outlet form in the renal pelvis return the loop back after to go into the liquid mouth, through such a way, not only improved the derivation efficiency of rubble, can prevent moreover that the fluid that discharges from the liquid outlet does not pass through the renal pelvis and directly flows in go into the liquid mouth.

It is yet another advantage of the present application to provide a ureteroscope for operation with loop-back calculus removal, wherein the liquid outlet and liquid inlet of the ureteroscope for operation with loop-back calculus removal have a special combination of poses to reduce the degree of interference of negative pressure in the liquid outlet channel with the suction of the fluid exiting from the liquid outlet.

Other advantages and features of the present application will become apparent from the following description and may be realized by means of the instrumentalities and combinations particularly pointed out in the appended claims.

To achieve at least one of the above advantages, according to one aspect of the present application, there is provided a ureteroscope for surgery capable of discharging stones in a loop, including:

a tube lens body having a front end portion and a rear end portion; and

an operation portion operatively provided at a rear end portion of the tube lens main body;

wherein, the tube mirror main part includes:

a tube structure body;

at least one fluid injection channel extending within the tube structure body from the rear end portion to the front end portion, the at least one fluid injection channel having at least one fluid outlet located at the front end portion; and

at least one fluid outlet channel extending from the front end to the rear end within the tubular body, the at least one fluid outlet channel having at least one fluid inlet located at the front end;

wherein the liquid outlet of the liquid injection channel has a first orientation for allowing the fluid to be injected into the renal pelvis from the liquid outlet along the liquid injection channel in a first direction in which the first orientation is directed, and the liquid inlet of the liquid outlet channel has a second orientation at a preset included angle with the first orientation for allowing the fluid to be sucked into the liquid outlet channel from the liquid inlet in a second direction in which the second orientation is directed after being deflected in the renal pelvis to form a fluid loop.

In the ureteroscope for operation of circulated stone discharge according to this application, the first direction with the contained angle of second direction is more than or equal to 90 and is less than 180.

In the ureteroscope for operation capable of discharging stones in a loop manner according to the present application, the liquid inlet is located in front of the liquid outlet in the axial direction set by the scope main body.

In the ureteroscope for operation capable of discharging calculus in a loop manner according to the application, the liquid outlet and the liquid inlet are two openings which are isolated from each other.

In the ureteroscope for operation of circulated calculus removal according to the present application, the tube structure main body has a front end surface and an outer peripheral surface, wherein the liquid outlet is formed in the outer peripheral surface of the tube structure main body, and the liquid inlet is formed in the front end surface of the tube structure main body.

In the ureteroscope for art of stone is arranged to circulated ring according to this application, the axis of pipescope main part with contained angle between the axis of liquid outlet is greater than 0 less than or equal to 90.

In the ureteroscope for operation capable of discharging stones back, the front end surface of the tube structure body extends forward from a first side of the outer peripheral surface to a second side opposite to the first side along the axial direction set by the tube diameter body.

In the ureteroscope for art of stone is arranged to circulated back according to this application, at least one liquid injection passageway includes first liquid injection passageway and second liquid injection passageway, first liquid injection passageway has and is located the first liquid outlet of front end portion, second liquid injection passageway has and is located the second liquid outlet of front end portion.

In the ureteroscope for operation of circulated round stone discharge according to this application, the external diameter of tubular structure main part equals 4.3 millimeters, the diameter of drain channel equals 2.2 millimeters, the equivalent diameter of first notes liquid passageway is more than or equal to 1.2 millimeters.

In the ureteroscope for surgery that can loop back and remove stone according to this application, the scope main body further includes the fiber channel that extends from the back end to the front end in the tubular structure main body.

In the ureteroscope for operation capable of discharging calculus in a loop mode according to the application, the optical fiber channel is communicated with the liquid outlet channel.

In the ureteroscope for operation of calculus is arranged to can returning according to this application, the ureteroscope for operation of calculus is arranged to can returning further includes the rubble mechanism that is used for beating the calculus, rubble mechanism set up in fiber channel.

In the ureteroscope for operation capable of discharging stones in a loop manner according to the application, the ureteroscope for operation capable of discharging stones in a loop manner further comprises an image acquisition device and a light source which are installed on the ureteroscope main body.

Further objects and advantages of the present application will become apparent from an understanding of the ensuing description and drawings.

These and other objects, features and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the embodiments of the application do not constitute a limitation of the application. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 illustrates one of the working schematic diagrams of a prior ureteroscope.

Fig. 2 illustrates a second operation diagram of a ureteroscope in the prior art.

Fig. 3 illustrates a schematic view of a surgical ureteroscope capable of discharging stones back according to an embodiment of the application.

Fig. 4 illustrates another schematic view of a surgical ureteroscope capable of backencircling stone removal according to embodiments of the present application.

Fig. 5 illustrates a schematic view of a scope body of a surgical ureteroscope that can loop back to remove stones in accordance with an embodiment of the present application.

Fig. 6A illustrates one of the partially schematic views of the body of a ureteroscope for a surgical ureteroscope that may loop back to remove stones in accordance with an embodiment of the present application.

Fig. 6B illustrates a second schematic partial view of a body of a ureteroscope for a surgical ureteroscope for loop evacuation of stones according to an embodiment of the present application.

Fig. 6C illustrates a third schematic partial view of the body of a ureteroscope for a loop-back calculus removal procedure according to an embodiment of the present application.

Fig. 6D illustrates four of a partial schematic view of a scope body of a surgical ureteroscope that can loop back to evacuate stones in accordance with an embodiment of the present application.

Fig. 7A illustrates one of the partially schematic views of the scope body of the ureteroscope for a procedure that can loop back to remove stones according to the variant of the embodiment of the present application.

Fig. 7B illustrates a second schematic partial view of a body of a ureteroscope for a surgical ureteroscope for loop-back calculus removal, according to a variation of the embodiments of the present application.

Fig. 7C illustrates a third schematic partial view of a body of a ureteroscope for a surgical ureteroscope for loop-back calculus removal, according to a variation of an embodiment of the present application.

Figure 7D illustrates four of the partial schematic views of the body of the ureteroscope for a loop-back calculus removal procedure performed according to variations of embodiments of the present application.

Fig. 8 illustrates a partial cross-sectional schematic view of a scope body of a surgical ureteroscope with loop-back stone evacuation according to an embodiment of the present application.

Fig. 9A illustrates one of the working schematic diagrams of the scope body of the operable ureteroscope capable of discharging stones back according to the embodiment of the present application when the scope body is in the renal pelvis.

Fig. 9B illustrates a second working schematic diagram of the ureteroscope body of the ureteroscope for operation with loop-back calculus removal according to the embodiment of the present application when the ureteroscope body is in the renal pelvis.

Figure 10A illustrates one of the operational schematics of a ureteroscope for a loop-back stone removal procedure to treat stones at different locations within the kidney, according to embodiments of the present disclosure.

Fig. 10B illustrates a second schematic diagram of the operation of the ureteroscope capable of discharging stones in a loop for operation to treat stones at different positions in the kidney according to the embodiment of the present application.

Fig. 10C illustrates a third operational schematic diagram of a ureteroscope for a loop-back stone removal procedure for handling stones at different locations in the kidney, according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.

Summary of the application

As described above, when the size of a calculus is large in the process of hitting the calculus with a ureteroscope, it is difficult for a conventional ureteroscope to crush the calculus into a crushed stone having an equivalent diameter of about 2mm and then to pulverize the crushed stone, and it is difficult to lead the crushed stone out of the patient body by an effective lead-out mechanism. The broken stone residue is one of the main reasons causing high recurrence rate of the stones.

Specifically, as shown in fig. 1 and 2, a tube 11P for a self-irrigating ureteroscope of a self-irrigating ureteroscope is provided with a water inlet passage 110P and a discharge passage 120P, the water inlet passage 110P having a water inlet 1101P, and the discharge passage 120P having a discharge inlet 1202P. The water inlet passage 110P is used for water inlet, and the discharge passage 120P is used for water discharge and crushed stone discharge. During the process of crushing stones, the water flow emitted from the water inlet 1101P of the water inlet passage 110P may impact the crushed stones, and when the water flow moves to the vicinity of the discharge inlet 1202P of the discharge passage 120P while carrying the crushed stones, the water flow and the crushed stones may be attracted to the discharge passage 120P due to the negative pressure environment of the discharge passage 120P to discharge the crushed stones out of the body.

However, in the practical application of this solution, the water flow is directly back-flowed in the opposite direction after being emitted from the water inlet 1101P to the discharge inlet 1202P facing the same direction as the water inlet 1101P, and the water inlet 1101P of the water inlet passage 110P is closer to the discharge inlet 1202P of the water discharge passage 120P. Therefore, the water flow emitted from the water inlet 1101P of the water inlet passage 110P is easily disturbed by the suction force in the discharge passage 120P, so that a part of the water flow emitted from the water inlet 1101P of the water inlet passage 110P does not collide with the discharge port 1202P to which the crushed stones have been sucked into the discharge passage 120P. Thus, part of the water flow emitted from the water inlet passage 110P does not impact crushed stones, and the crushed stones still stay in the kidney, so that the crushed stone discharge efficiency is low.

Further, a formation portion of the inlet water outlet 1101P is convex with respect to a formation portion of the discharge inlet 1202P. When the fluid exits from the water inlet 1101P and impacts the crushed stone forwards, it is difficult to flush the heavier crushed stone at the bottom of the renal pelvis, or only the crushed stone can be driven to move disorderly, resulting in low efficiency of the crushed stone discharge, as shown in fig. 2.

In addition, since both the water inlet 1101P of the water inlet channel 110P and the water outlet 1202P of the water outlet channel 120P are formed on the working end surface of the self-priming ureter endoscope 11P, both the water inlet 1101P and the water outlet 1202P occupy the radial space of the ureter endoscope 11P. In order to ensure that debris can pass through the discharge passage 120P, the discharge inlet 1202P is relatively large in size, limited by the radial space of the ureteroscope tube 11P, and the inlet 1101P is relatively small in size, resulting in a relatively small water output from the inlet 1101P, a small impact force, a short range of water flow, and an increased impact force by increasing the inlet pressure, an extended stroke, and an increased risk of pressure rise within the renal pelvis. The small size of the water inlet 1101P makes it difficult for the crushed stones to be washed up by the water flow exiting from the water inlet 1101P, and thus the efficiency of crushed stone discharge is low. Also, the short-throw water flow is easily disturbed by the negative pressure at the discharge inlet 1202P.

The inventors of the present application have found that the relative positional relationship of the fluid flow direction, the inlet water outlet 1101P and the discharge inlet 1202P affects the debris extraction efficiency. Accordingly, the inventors of the present application have improved the efficiency of rock debris removal by controlling the flow direction of the fluid by adjusting the relative positional relationship of the opening for introducing the fluid and the opening for discharging the fluid. Based on the technical scheme, the ureteroscope for operation capable of discharging the calculus in a loop mode comprises: a tube lens main body having a front end portion and a rear end portion; and an operation portion operatively provided to a rear end portion of the tube lens main body; wherein, the tube mirror main part includes: a tube structure body; at least one liquid injection channel extending within the tubular structure body from the rear end portion to the front end portion, the at least one liquid injection channel having at least one liquid outlet located at the front end portion; and at least one fluid outlet channel extending from the front end to the rear end within the tubular body, the at least one fluid outlet channel having at least one fluid inlet located at the front end; the liquid outlet of the liquid injection channel is provided with a first orientation for allowing the fluid to be injected into the renal pelvis from the liquid outlet along the liquid injection channel in a first direction directed by the first orientation, and the liquid inlet of the liquid outlet channel is provided with a second orientation which forms a preset included angle with the first orientation for allowing the fluid to be sucked into the liquid outlet channel from the liquid inlet in a second direction directed by the second orientation after being turned in the renal pelvis to form a fluid loop.

Exemplary ureteroscope for operation capable of circularly discharging stones

As shown in fig. 3 to 9B, a urinary catheter 100 for operation with a loop-back calculus removal according to an embodiment of the present application is illustrated. For convenience of explanation, the ureteroscope 100 will be described with reference to the application of the ureteroscope 100 to the treatment of a stone c in the renal pelvis p.

The loop-back lithotripsy operative ureteroscope 100 may be used to examine the condition of the kidney, break up stones c within the renal pelvis p, and guide the discharge of the broken stones. In the embodiment of the present application, the ureteroscope 100 for a loop-back calculus removal operation includes a scope body 10 having a front end portion 110 and a rear end portion 120, and an operation portion 20 operatively disposed at the rear end portion 120 of the scope body 10, as shown in fig. 3 and 4.

In practical applications, the endoscope main body 10 as an insertion portion of the loop-back lithotomy ureteroscope 100 can be inserted into a ureter or a kidney from a urethra, and an image acquisition device 300 and a light source 400 can be disposed on the endoscope main body 10 to acquire images of the kidney and a calculus located in the kidney. Preferably, the tube lens body 10 has a smooth outer surface, or the outer surface of the tube lens body 10 is smooth after entering the patient, so that the tube lens body 10 can smoothly enter the kidney. As shown in fig. 3, the operation portion 20, which is a bridge connecting the ureteroscope 100 for the loop-back stone removal operation and an external device, can be communicably connected to an image output device 500 (e.g., a computer communicably connected to the image acquisition device 300) to acquire images of the kidney and stones located in the kidney, thereby facilitating a user to observe the condition of stones c in the renal pelvis p. Further, the operable members (e.g., the lithotripsy mechanism 200, the guide mechanism 600, the injection device 700, the suction device 800) can be operated by other functions of the operation portion 20. For example, the stone c in the renal pelvis p is hit with holmium laser which enters the tube lens body 10 through the operation part 20, and as another example, the broken stone in the kidney is sucked by the suction apparatus 800 which communicates with the tube lens body 10 through the operation part 20.

Specifically, the tube mirror body 10 includes a tube structure body 11, at least one liquid injection channel 12, and at least one liquid outlet channel 13. The at least one fluid injection channel 12 extends from the rear end portion 120 to the front end portion 110 within the tubular structure body 11, and the at least one fluid outlet channel 13 extends from the front end portion 110 to the rear end portion 120 within the tubular structure body 11. Moreover, the fluid injection channel 12 and the fluid outlet channel 13 are preferably independent from each other, so that the fluid with the crushed stones can be simultaneously attracted to the fluid outlet channel 13 in the process of guiding the fluid to the kidney through the fluid injection channel 12 and impacting the crushed stones, and mutual interference between impacting the crushed stones and attracting the crushed stones is avoided.

The at least one liquid injection channel 12 has at least one liquid outlet 121 located at the front end portion 110 and at least one first operation port 122 communicated with the at least one liquid outlet 121, and the at least one liquid outlet channel 13 has at least one liquid inlet 131 located at the front end portion 110 and a second operation port 132 communicated with the at least one liquid inlet 131.

Correspondingly, the operating part 20 includes an operating body 210, a first operating end 21 disposed on the operating body 210 and communicated with the liquid filling channel 12, and a second operating end 22 disposed on the operating body 210 and communicated with the liquid outlet channel 13. The operation portion 20 is connected to the liquid filling channel 12 through the first operation end 21 connected to the first operation port 122, and is connected to the liquid outlet channel 13 through the second operation end 22 connected to the second operation port 132. The first operation end 21 is suitable for being connected with a liquid injection device 700 and allowing the liquid injection device 700 to inject fluid into the renal pelvis p through the liquid injection channel 12, and the second operation end 22 is suitable for being connected with a suction device 800 (such as an air pump) and allowing the suction device 800 to suck the fluid and the crushed stones near the liquid outlet channel 13 through the liquid outlet channel 13. In order to control the negative pressure in the outlet channel 13, in a specific embodiment, the operation part 20 further comprises a negative pressure regulator 26, and the negative pressure regulator 26 is configured to regulate the air pressure in the outlet channel 13, as shown in fig. 3 and 4.

It should be understood that the roles of the first operating end 21 and the second operating end 22 are not intended to limit the present application. The first operation terminal 21 and the second operation terminal 22 are also adapted to allow other devices to perform other functional operations. For example, the first manipulation end 21 is adapted to allow a guide mechanism 600 to pass through the injection channel 12 and guide the scope body 10 to a target position. It should also be understood that the operating portion 20 may also include other operating ends to allow other devices to perform other functional operations.

It should be noted that the forming mode of the liquid filling channel 12 and the liquid outlet channel 13 is not limited by the present application. The liquid inlet channel 12 and the liquid outlet channel 13 may be formed by a plurality of through holes of the pipe structure body 11 itself, or may be formed by a plurality of hollow pipe bodies cooperatively. Accordingly, in some embodiments, the tube structure body 11 has a first through hole 101 and a second through hole 102 penetrating the front end portion 110 and the rear end portion 120 of the tube mirror body 10, and the first through hole 101 and the second through hole 102 form the liquid injection channel 12 and the liquid outlet channel 13, respectively.

In other embodiments, the tubular structure body 11 includes a first tube 60, a second tube 70 extending within the first tube 60, and a third tube 80 extending within the first tube 60. The first tube 60 has a first front opening 61 and a second front opening 63 formed in the front end portion 110 of the tube lens body 10, and a first rear opening 62 and a second rear opening 64 formed in the rear end portion 120 of the tube lens body 10. The second tube 70 has a first through hole 71 extending between a first front opening 61 of the front end portion 110 and a first rear opening 62 of the rear end portion 120, the first front opening 61, the first through hole 71 and the first rear opening 62 are communicated with each other and form the liquid injection channel 12, wherein the first front opening 61 forms the liquid outlet 121 of the liquid injection channel 12, and the first rear opening 62 forms the first operation opening 122 of the liquid injection channel 12. The third tube 80 has a second through hole 81 extending between the second front opening 63 of the front end portion 110 and the second rear opening 64 of the rear end portion 120, the second front opening 63, the second through hole 81 and the second rear opening 64 are interconnected and form the liquid outlet channel 13, wherein the second front opening 63 forms the liquid inlet 131 of the liquid outlet channel 13, and the second rear opening 64 forms the second operation port 132 of the liquid outlet channel 13.

The combination manner among the first tube 60, the second tube 70 and the third tube 80 is not limited in this application. For example, the first tube 60, the second tube 70, and the third tube 80 may be integrally joined together to form a unitary structure, or the second tube 70 and the third tube 80 may be secured within the first tube 60, respectively.

In practice, the lithotripsy mechanism 200 (e.g., holmium laser) can reach into the kidney and break up the stones c. During the process of smashing the stone c by the holmium laser, the liquid injection channel 12 can guide the fluid to be emitted from the liquid outlet 121 of the liquid injection channel to impact the gravel and wrap the gravel in motion. The air pressure in the liquid outlet channel 13 is in a negative pressure state, so when the fluid carrying the crushed stone moves to a position close to the liquid inlet 131, the fluid and the crushed stone are attracted to the liquid outlet channel 13, and the fluid may be interfered by the attraction force in the liquid outlet channel 13 in the process of impacting the crushed stone.

The inventor of the present application finds that suction interference to the fluid can be reduced by adjusting the relative positional relationship between the liquid outlet 121 and the liquid inlet 131 and controlling the flow direction of the fluid, thereby improving the calculus removal efficiency. In the embodiment of the present application, the liquid outlet 121 and the liquid inlet 131 of the ureteroscope 100 for operation capable of discharging stones in a loop form have a special posture combination, so that the fluid emitted from the liquid outlet 121 flows back to the liquid inlet 131 after forming a loop in the renal pelvis p, thereby not only improving the efficiency of discharging the stones, but also preventing the fluid discharged from the liquid outlet 121 from directly flowing into the liquid inlet 131 without passing through the renal pelvis p. Here, the posture refers to the positions and postures of the liquid outlet 121 and the liquid inlet 131, and may be expressed by 6 degrees of freedom (degrees of freedom of movement in three coordinate axis directions and degrees of freedom of rotation about three coordinate axes).

Specifically, in the embodiment of the present application, the liquid outlet 121 of the liquid injection channel 12 has a first orientation for allowing the fluid to be injected into the renal pelvis p along the liquid injection channel 12 from the liquid outlet 121 in a first direction directed in the first orientation, and the liquid inlet 131 of the liquid outlet channel 13 has a second orientation at a preset included angle with the first orientation for allowing the fluid to be sucked into the liquid outlet channel 13 from the liquid inlet 131 in a second direction directed in the second orientation after being deflected in the renal pelvis p to form a fluid loop, as shown in fig. 8 to 9B.

The second orientation is different from the first orientation, the first orientation is the same as the first orientation, and the second orientation is opposite to the second orientation, so that an included angle between the first orientation and the second orientation is not 0 ° or 180 °, that is, the first orientation and the second orientation are different from each other and are not opposite to each other. Therefore, the fluid emitted from the liquid outlet 121 along the first direction flows back along the second direction having an included angle with the first direction after being deflected, so as to form a vortex-type fluid loop, which can prevent the fluid from flowing back to the liquid inlet 131 facing the same direction as the liquid outlet 121 along the opposite direction of the first direction directly after being emitted from the liquid outlet 121 along the first direction, and further reduce the interference of the attractive force on the fluid.

It should be noted that, in other embodiments of the present application, the first direction and the second direction may be the same direction or opposite directions, and the liquid outlet 121 and the liquid inlet 131 are isolated from each other, so as to reduce interference of the negative pressure in the liquid outlet channel 13 to the fluid, which is not limited in the present application.

In the embodiment of the present application, an included angle between the first direction and the second direction is greater than or equal to 90 ° and less than 180 °. In a specific example, the second direction is parallel to or infinitely close to the axial direction set by the tube lens body 10, the angle between the first direction and the axial direction set by the tube lens body 10 is greater than 0 ° and less than or equal to 90 °, and correspondingly, the angle between the first direction and the second direction is greater than or equal to 90 ° and less than or equal to 180 °. In another specific example, the first direction is parallel to or infinitely close to an axial direction set by the tube lens body 10, the second direction has an angle greater than 0 ° and equal to or less than 90 ° with respect to the axial direction, and accordingly, the first direction has an angle greater than or equal to 90 ° and less than 180 ° with respect to the second direction.

In a specific embodiment of the present application, an included angle between a central axis of the liquid outlet 121 and a central axis of the liquid inlet 131 is greater than 0 ° and less than or equal to 90 °, so that the first direction and the second direction form a preset included angle.

In this embodiment, the liquid outlet 121 and the liquid inlet 131 are not flush in the axial direction set by the tube lens main body 10, so that the distance between the liquid outlet 121 and the liquid inlet 131 and the movement path of the fluid can be prolonged, which not only reduces the interference of the negative pressure in the liquid outlet channel 13 on the suction of the fluid, but also improves the efficiency of leading out the crushed stone because the area range of the fluid flowing through is wider and the crushed stone on the movement path of the fluid that the fluid can wrap on is relatively more.

Here, that the liquid outlet 121 and the liquid inlet 131 are not flush with each other in the axial direction set by the tube lens body 10 means that there is a height difference between the liquid outlet 121 and the liquid inlet 131, and the distances between the liquid outlet 121 and the liquid inlet 131 and the front end point located at the forefront of the tube lens body 10 are different. In a specific example, the distance between the liquid outlet 121 and the front end point of the tube lens body 10 is greater than the distance between the liquid inlet 131 and the front end point of the tube lens body 10, that is, the liquid inlet 131 is located axially in front of the liquid outlet 121, and the liquid inlet 131 is closer to the front end point of the tube lens body 10 than the liquid outlet 121. In another specific example, the distance between the liquid outlet 121 and the front end point of the tube lens body 10 is smaller than the distance between the liquid inlet 131 and the front end point of the tube lens body 10, that is, the liquid outlet 121 is located axially in front of the liquid inlet 131, and the liquid outlet 121 is closer to the front end point of the tube lens body 10 than the liquid inlet 131.

In a modified embodiment of the present application, the liquid outlet 121 and the liquid inlet 131 may be flush with each other in the axial direction set by the tube lens body 10, which is not limited by the present application.

In the embodiment of the present application, the liquid outlet 121 and the liquid inlet 131 are two isolated openings, so as to reduce the interference of the negative pressure in the liquid outlet channel 13 to the fluid. In some embodiments of the present application, the liquid outlet 121 and the liquid inlet 131 are located on two different surfaces.

In a specific example of the present application, as shown in fig. 8, the tube structure body 11 has a front end surface 1101 and an outer peripheral surface 1102, the liquid outlet port 121 is formed in the outer peripheral surface 1102 of the tube structure body 11, and the liquid inlet port 131 is formed in the front end surface 1101 of the tube structure body 11. In this way, the liquid outlet 121 is opened laterally, the liquid inlet 131 is opened forward, and the fluid is injected into the renal pelvis p from the liquid outlet 121 formed on the outer circumferential surface 1102 of the tube structure body 11 in the first direction, and is diverted to be sucked into the liquid outlet channel 13 from the liquid inlet 131 in the second direction bypassing the outer circumferential surface 1102, so as to form a vortex-type fluid loop, which can reduce the suction interference to the fluid.

Specifically, the pipe structure body 11 includes a front peripheral wall 111 and a rear peripheral wall 112 extending rearward from the front peripheral wall 111, the front peripheral wall 111 having a front outer peripheral surface 1111 and a front inner peripheral surface 1112, and the rear peripheral wall 112 having a rear outer peripheral surface 1121 and a rear inner peripheral surface 1122. The front outer circumferential surface 1111 and the rear outer circumferential surface 1121 form the outer circumferential surface 1102 of the tube structure main body 11.

The front peripheral wall 111 also has a front cross-section 1113 formed between the front outer peripheral surface 1111 and the front inner peripheral surface 1112, and the rear peripheral wall 112 also has a rear cross-section 1123 formed between the rear outer peripheral surface 1121 and the rear inner peripheral surface 1122, opposite to the front cross-section 1113. The front cross-section 1113 and the rear cross-section 1123 form the outlet opening 121, in this particular example, the first orientation refers to: a plane equidistant from the plane of the front cross-section 1113 and the plane of the rear cross-section 1123 is relative to the direction in which the outer circumferential surface 1102 extends. The fluid injected into the liquid injection channel 12 exits in the first direction along the front cross-section 1113 and the rear cross-section 1123 of the tube structure main body 11, wherein the first direction coincides with the first orientation.

The tubular structure body 11 further includes a first front end wall 113 and a second front end wall 114 extending laterally from the first front end wall 113, the first front end wall 113 having a first inner end surface 1132 and a first outer end surface 1131, and the second front end surface 1101 having a second inner end surface 1142 and a second outer end surface 1141. The first outer end surface 1131 and the second outer end surface 1141 form the front end surface 1101 of the tube structure body 11, and the first inner end surface 1132 and the second inner end surface 1142 form an inner end surface of the tube structure body 11.

First front end wall 113 further has a first cross section 1133 formed between first inner end surface 1132 and first outer end surface 1131, and second front end wall 114 further has a second cross section 1143 formed between second inner end surface 1142 and second outer end surface 1141 opposite to first cross section 1133. The first cross-section 1133 and the second cross-section 1143 form the liquid inlet 131, and in this specific example, the second orientation refers to: a plane equidistant from the plane of the first cross-section 1133 and the plane of the second cross-section 1143 is relative to the direction in which the front face 1101 extends. The preset included angle between the second orientation and the first orientation is larger than 0 degrees and smaller than or equal to 90 degrees. The fluid near the liquid inlet 131 is sucked into the liquid outlet channel 13 from the liquid inlet 131 along the first cross section 1133 and the second cross section 1143 of the tubular structure body 11 in the second direction, wherein the second direction is opposite to the second direction, and the included angle between the first direction and the second direction is greater than or equal to 90 ° and less than 180 °.

In particular, in this specific example, the liquid outlet port 121 formed in the outer peripheral surface 1102 of the pipe structural body 11 occupies mainly the axial dimension of the pipe structural body 11, and the liquid inlet port 131 formed in the front end surface 1101 of the pipe structural body 11 occupies mainly the radial dimension of the pipe structural body 11. In this way, without coordinating the space ratio occupied by the liquid outlet 121 and the liquid inlet 131 in the radial direction of the tubular main body 11 under the condition that the radial dimension of the tubular main body 11 is limited, the sizes of the liquid inlet 131 and the liquid outlet 121 can be relatively increased, and the design flexibility of the shapes and the number of the liquid inlets 131 and the liquid outlets 121 is relatively improved. Through the reasonable arrangement of the liquid outlets 121 and the liquid inlets 131, the size of the liquid inlets 131 of the liquid outlet channel 13 is ensured so that the fluid and the crushed stones can smoothly pass through, and the liquid outlet amount of the liquid outlets 121 of the liquid injection channel 12 can be ensured.

When the liquid outlet 121 has a large liquid outlet amount, on one hand, the range of the fluid emitted from the liquid outlet 121 is relatively extended, the impact force on the crushed stone is relatively increased, the absorbed interference is relatively weakened, and the lead-out efficiency of the crushed stone is relatively improved. On the other hand, ureteroscope can realize great play liquid measure under the liquid injection pressure of relative lower, has reduced the risk that the pressure rises in the kidney.

Specifically, as shown in fig. 5 to 6D, in one embodiment of this specific example, the front end face 1101 of the tube structure body 11 extends obliquely forward in the axial direction set by the tube mirror body 10 from a first side of the outer peripheral surface 1102 to a second side opposite to the first side. For example, the front end surface 1101 of the tube structure body 11 extends obliquely forward from a lower side set by the outer peripheral surface 1102 to an upper side opposite to the lower side in the axial direction set by the tube mirror body 10, as shown in fig. 6A.

Accordingly, the liquid inlet 131 formed in the front end surface 110 extends forward from a first side of the liquid outlet channel 13 to a second side opposite to the first side along the axial direction set by the tube lens body 10, wherein the first side of the outer peripheral surface 1102 corresponds to the first side of the liquid outlet channel 13, and the second side of the outer peripheral surface 1102 corresponds to the second side of the liquid outlet channel 13. Accordingly, the shape of the liquid inlet 131 approximates to an ellipse.

Specifically, the front end surface 1101 may be designed as a convex slope, a concave slope, a wave slope, and other types of slopes formed between the first side and the second side of the outer peripheral surface 1102, which is not limited in this application. In a specific example of the present application, the front end surface 1101 is designed as a wave-shaped inclined surface depressed in the middle between the first side and the second side of the outer peripheral surface 1102.

It should be understood that, in other embodiments, the front end surface 1101 of the pipe structure body 11 may also be designed such that the front end surface 1101 of the pipe structure body 11 extends along the axial direction set by the mirror body 10 from a first side of the outer peripheral surface 1102 to a second side opposite to the first side (i.e., an end of the front end surface 1101 close to the first side of the liquid outlet channel 13 is axially flush with an end thereof close to the second side of the liquid outlet channel 13), and this is not a limitation of the present application.

It is worth mentioning that when the front face 1101 is designed to extend from the first side to the second side of the outer peripheral surface 1102 forward along the axial direction set by the scope body 10, on the one hand, the fluid detouring path is extended, and not only is the suction disturbance relatively reduced, but also the fluid passing area is wider, and more debris on the fluid moving path in the kidney can be trapped, and the debris leading-out efficiency can be improved, compared to when the front face 1101 is designed to extend flush from the first side to the second side of the outlet passage 13 (i.e., the end of the front face 1101 close to the outlet passage 13 is flush in the axial direction with the end close to the second side of the outlet passage 13). On the other hand, when the front end surface 1101 is designed to extend obliquely forward along the axial direction set by the tube lens main body 10 from the first side to the second side of the outer peripheral surface 1102, a relatively large distribution space can be provided for the liquid inlet 131, and accordingly, the size of the liquid inlet 131 is relatively increased, so that Xu Jiaoduo crushed stone and a fluid with a large flow rate can be allowed to enter the liquid outlet channel 13 from the liquid inlet 131, the crushed stone is prevented from blocking the liquid inlet 131, and the crushed stone discharge efficiency is improved.

It should be noted that, preferably, the diameter of the liquid filling channel 12 is equal to or slightly larger than the diameter of the liquid outlet channel 13, so as to achieve flow balance. Here, the diameter of the liquid filling channel 12 is equal to or slightly larger than the diameter of the liquid outlet channel 13, which means that: the sum of the equivalent diameters of all the liquid filling channels 12 is equal to or slightly larger than the sum of the equivalent diameters of all the liquid outlet channels 13.

In one embodiment of the present application, the number of the liquid inlets 131 is 1, and the number of the liquid outlets 121 is 2. Correspondingly, the at least one liquid injection channel 12 includes a first liquid injection channel having a first liquid outlet located at the front end portion 110 and a second liquid injection channel having a second liquid outlet located at the front end portion 110, and the first liquid outlet and the second liquid outlet are oppositely disposed.

In this embodiment, an average value of a first inner diameter of the first liquid injection channel and a second inner diameter of the second liquid injection channel is greater than or equal to one half of a diameter of the liquid outlet channel 13, a size of the liquid outlet 121 matches with a size of the first liquid injection channel, and a size of the liquid inlet 131 matches with a size of the liquid outlet channel 13. More specifically, the outer diameter of the tube structure main body 11 is equal to 4.3 mm, the diameter of the liquid outlet channel 13 is equal to 2.2 mm, and the equivalent diameter of the first liquid injection channel or the second liquid injection channel is equal to or greater than 1.2 mm.

In another embodiment of the present application, the number of the liquid inlets 131 is 1, and the number of the liquid outlets 121 is 2. The liquid injection channel 12 is circumferentially formed around the liquid outlet channel 13, that is, the liquid injection channel 12 is an annular channel circumferentially formed around the liquid outlet channel 13, or the cross section of the liquid injection channel 12 is annular, the liquid injection channel 12 has two liquid outlets 121 formed on the front end portion 120, and the two liquid outlets 121 are formed on the outer peripheral surface 1102. In this specific embodiment, the outer diameter of the pipe structure main body 11 is equal to 4.3 mm, the diameter of the liquid outlet channel 13 is equal to 2.2 mm, and the equivalent diameter of the liquid injection channel is equal to or greater than 1.2 mm.

It should be understood that the size, shape and number of the liquid inlets 131 and the liquid outlets 121 are not limited in this application, and the size, shape and number of the liquid inlets 131 and the liquid outlets 121 can be adjusted according to practical application conditions to realize controllable and ordered fluid loops.

It should be noted that the manner of isolating the liquid inlet 131 and the liquid outlet 121 is not limited in the present application. When the liquid outlet port 121 is formed in the front end surface 1101 of the tube structure body 11 and the liquid inlet port 131 is formed in the outer peripheral surface 1102 of the tube structure body 11, the liquid inlet port 131 and the liquid outlet port 121 may be isolated from each other. It should be understood that a partition wall may be disposed between the front end surface 1101 and the outer peripheral surface 1102 to separate the liquid inlet 131 from the liquid outlet 121.

Accordingly, in another specific example of the present application, it may be designed that the liquid outlet port 121 is formed in the front end surface 1101 of the tube structure body 11, and the liquid inlet port 131 is formed in the outer peripheral surface 1102 of the tube structure body 11. The first cross section 1133 of the first front end wall 113 of the tube structure body 11 and the second cross section 1143 of the second front end wall 114 form the liquid outlet 121, and the front cross section 1113 of the front circumferential wall 111 and the rear cross section 1123 of the rear circumferential wall 112 of the tube structure body 11 form the liquid inlet 131.

Accordingly, the first orientation refers to: a plane equidistant from a plane of the first cross-section 1133 and a plane of the second cross-section 1143 is relative to a direction in which the front face 1101 extends, wherein the first direction is coincident with the first direction. The second orientation refers to: a plane equidistant from the plane of the front section 1113 and the plane of the rear section 1123 is oriented with respect to the direction in which the outer circumferential surface 1102 extends. The second orientation with predetermine contained angle between the first orientation and be greater than 0 and less than or equal to 90, the second direction with the second orientation is opposite, the first direction with the contained angle of second direction is greater than or equal to 90 and is less than 180.

Preferably, the liquid outlet 121 is provided on the outer circumferential surface 1102 of the tube structure body 11, and the liquid inlet 131 is provided on the front end surface 1101 of the tube structure body 11.

It should be noted that the positions of the liquid inlet 131 and the liquid outlet 121 are not limited in the present application, and in other specific examples, the liquid inlet 131 and the liquid outlet 121 may be disposed at other positions. As shown in fig. 7A to 7D, in a specific example of the present application, the liquid inlet 131 and the liquid outlet 121 are both disposed on the front end surface 1101 of the tube structure main body 11. Specifically, in this specific example, the liquid injection channel 12 is formed around the liquid outlet channel 13, that is, the liquid injection channel 12 is an annular channel formed around the liquid outlet channel 13, or the cross section of the liquid injection channel 12 is annular, the liquid injection channel 12 has two injection ports 121 formed on the front end portion 120, and the two injection ports 121 are respectively located on two sides of the suction port 131.

In the embodiment of the present application, the tube scope body 10 further includes a fiber channel 14 extending from the rear end portion 120 to the front end portion 110 in the tube structure body 11, the fiber channel 14 having a fiber channel opening 141 at the front end portion 110 and a third operation port 142 at the rear end portion 120 of the tube scope body 10.

Accordingly, in some embodiments, the tube structure body 11 further has a third through hole 103 penetrating the front end portion 110 and the rear end portion 120 of the tube mirror body 10, and the third through hole 103 forms the optical fiber channel 14. In other embodiments, the tubular structure body 11 further includes a fourth tube 90, and the fourth tube 90 cooperates with other tubes (e.g., the first tube 60, the second tube 70, and the third tube 80) to form the fiber channel 14.

It should be mentioned that the optical fiber channel 14 can be independent from the liquid injection channel 12 and the liquid outlet channel 13, and can also be communicated with the liquid injection channel 12 and/or the liquid outlet channel 13. In a specific example of the present application, the fiber channel 14 is independent of the liquid injection channel 12 and the liquid outlet channel 13. Specifically, the tube structure body 11 further includes a fourth tube 90 extending inside the first tube 60, the first tube 60 having a third front opening 65 formed at a front end 110 of the tube mirror body 10 and a third rear opening 66 formed at a rear end 120 of the tube mirror body 10. The fourth tube 90 has a third through hole 91 extending between the third front opening 65 of the front end portion 110 and the third rear opening 66 of the rear end portion 120, the third front opening 65, the third through hole 91 and the third rear opening 66 form the fiber channel 14, wherein the third front opening 65 forms the fiber channel opening 141 and the third rear opening 66 forms the third operation opening 142.

In another specific example of the present application, as shown in fig. 8, the fiber channel 14 is communicated with the liquid outlet channel 13. In this particular example, the fiber channel 14 shares at least a portion of the tube and at least one opening with the outlet channel 13.

Specifically, the tubular structure body 11 further includes a fourth tube 90 extending within the first tube 60. The first tube 60 has a first rear opening 62 and a second rear opening 64 formed in the rear end 120 of the tube lens body 10; the third tube 80 has a second through hole 81 extending between a second front opening 63 of the front end portion 110 and a second rear opening 64 of the rear end portion 120, the second front opening 63, the second through hole 81 and the second rear opening 64 are communicated with each other and form the liquid outlet channel 13, wherein the second front opening 63 forms the liquid inlet 131 of the liquid outlet channel 13, and the second rear opening 64 forms the second operation port 132 of the liquid outlet channel 13. The third tube 80 further has a connection interface 82, and the first tube 60 further has a third rear opening 66 formed in the rear end 120 of the tube lens body 10. The fourth tube 90 has a third through hole 91 extending between the connection port 82 of the third tube 80 and the third rear opening 66 of the rear end 120. The fourth tube 90 is in communication with the third tube 80 and the second front opening 63 of the first tube 60, the second front opening 63, at least a portion of the third tube 80, the third through hole 91, and the third rear opening 66 form the fiber channel 14, wherein the third rear opening 66 forms the third operation port 142 of the fiber channel 14, the second front opening 63 forms a common opening of the fiber channel 14 and the liquid outlet channel 13, and the second front opening 63 can be used as both the liquid inlet 131 of the liquid outlet channel 13 and the fiber channel opening 141 of the fiber channel 14.

It is worth mentioning that the fiber channel 14 can be formed in other channels, for example, in other examples of the present application, the fiber channel 14 is formed in the liquid outlet channel 13. Specifically, the tube body 10 further includes a fiber channel 14 extending within the tube structure body 11 from the rear end 120 to the front end 110, and the fourth tube 90 extends within the third tube 80 within the tube structure body 11. The fourth tube 90 has a front opening formed at the fiber channel opening 141, a rear opening formed at the third operation port 142, and a third through hole 91 extending between the front opening and the rear opening.

The fiber channel 14 is adapted to allow operable components to pass through, for example, in one specific example of the application, the loop-back stone removal operative ureteroscope 100 further comprises a lithotripsy mechanism 200 for hitting stones, and the fiber channel 14 allows the lithotripsy mechanism 200 (e.g., holmium laser) to pass through. The lithotripsy mechanism 200 may be fixed within the fiber channel 14 or may be movably mounted within the fiber channel 14, but is not limited thereto.

In one particular example of the present application, the lithotripter mechanism 200 is telescopically mounted within the fiber channel 14, and the lithotripter mechanism 200 is extendable and retractable within the fiber channel 14 from the fiber channel opening 141. In this specific example, the optical fiber channel 14 is communicated with the liquid outlet channel 13, and the liquid inlet 131 of the liquid outlet channel 13 is a common opening of the liquid outlet channel 13 and the optical fiber channel 14, that is, the liquid inlet 131 can be used as the optical fiber channel opening 141, and the rock breaking mechanism 200 can be extended or retracted from the liquid inlet 131.

In another specific example of the present application, the lithotripter 200 is movable relative to a central axis of the liquid inlet 131, and is movable within the optical fiber channel 14 in a direction close to the central axis of the liquid inlet 131, or movable within the optical fiber channel 14 in a direction away from the central axis of the liquid inlet 131.

The lithotripsy mechanism 200 may be implemented as a holmium laser or other type of tool capable of striking the stone c. The holmium laser can emit laser light, and the energy generated by the holmium laser can enable water between the calculus c and the holmium laser to form tiny vacuoles and transfer the energy to the calculus c so as to hit the calculus c. During the process that the holmium laser strikes the calculus c, a large amount of energy is absorbed by water, and damage to tissues around the calculus c caused by the holmium laser can be reduced.

Correspondingly, the operation portion 20 further comprises a third operation end 23 communicated with the optical fiber channel 14, and the operation portion 20 is communicated with the optical fiber channel 14 through the third operation end 23 communicated with the third operation port 142, so as to allow the lithotripsy mechanism 200 to enter the optical fiber channel 14 through the operation portion 20 and further enter the kidney to hit the calculi c.

In the embodiment of the present application, the ureteroscope 100 further includes an image capturing device 300 and a light source 400 mounted on the scope body 10 to capture images of the kidney and stones located therein. The positions of the image capturing device 300 and the light source 400 are not limited in this application, and preferably, the liquid inlet 131 of the liquid outlet channel 13 is located in the visible area of the image capturing device 300 to capture the situation near the liquid inlet 131, so that the user can observe the guiding situation of the gravels. The light source 400 may be disposed near the image pickup device 300 to provide a sufficient amount of light to the image pickup device 300.

Accordingly, the operation section 20 further includes a fourth operation terminal 24 communicably connected to the image capturing apparatus 300. Also, the image output device 500 (e.g., a computer communicably connected to the image capturing device 300) may be communicably connected to the image capturing device 300 through the operating portion 20 to acquire images of the kidney and the stone located in the kidney, so that the user can observe the condition of the stone c in the renal pelvis p.

It is worth mentioning that, in order to ensure the stiffness of the tube lens main body 10 while ensuring that the tube lens main body 10 can be bent to reach different target positions, the tube lens main body 10 includes a flexible portion 1010 adjacent to the front end portion 110 and a rigid portion 1020 coupled to the flexible portion 1010. The rigid portion 1020 may extend backward from the flexible portion 1010, or the rigid portion 1020 covers at least a portion of the flexible portion 1010 to ensure local stiffness of the tube lens body 10.

Accordingly, the operation portion 20 further comprises a fifth operation end 25 operatively connected to the flexible portion 1010 and an operation mechanism 27 mounted on the fifth operation end 25, wherein the operation mechanism 27 is operatively connected to the flexible portion 1010 through the fifth operation end 25 to control the bending degree of the flexible portion 1010, so that the tube lens main body 10 can reach different target positions, and the bending degree of the flexible portion 1010 can be adjusted according to actual conditions. In one specific example, the operating mechanism 27 includes a control line 271 connected to the flexible portion 1010 and an adjuster 272 connected to the control line 271, the adjuster 272 being configured to drive the control line 271 to pull the flexible portion 1010 to cause the flexible portion 1010 to bend. The structure of the operating mechanism 27 and the manner of controlling the bending of the flexible portion 1010 are not limited in this application, i.e., the operating mechanism 27 can be designed in other structures and control the bending of the flexible portion 1010 in other manners.

In a specific example, at least a part of the front end portion 110 of the tube lens body 10 is the flexible portion 1010, so that the liquid injection channel 12 and the liquid outlet channel 13 can be bent, and the liquid inlet 131, the liquid outlet 121, and the optical fiber channel opening 141 can be directed to a stone c at a target position. The flexible portion 1010 includes an active bending portion 1011 and a passive bending portion 1012, the active bending portion 1011 is bendable by the manipulation of the operation portion 20 and maintains a bent state, and the passive bending portion 1012 is bent according to the bending of the active bending portion 1011.

Fig. 10A to 10C are schematic diagrams illustrating the operation of the loop-back calculus removing surgical ureteroscope 100 according to the embodiment of the present application for treating a calculus C at different target positions, and the operation of the loop-back calculus removing surgical ureteroscope 100 will be described below by taking the application of the loop-back calculus removing surgical ureteroscope 100 to the treatment of a calculus C in a renal pelvis p as an example.

First, the tube scope body 10 is inserted to an initial predetermined position of the kidney. Specifically, the scope body 10 may be advanced along the patient's ureter into the kidney and to an initial predetermined location. In this process, an image of the surrounding environment where the tube lens body 10 passes can be collected and displayed by the image collecting device 300 provided to the tube lens body 10 and the image output device 500 communicably connected to the image collecting device 300, and the tube lens body 10 is guided to the initial predetermined position in cooperation with the guide mechanism 600. Specifically, the guide mechanism 600 can enter the injection channel 12 through the operation portion 20 and guide the tube lens body 10 to the initial predetermined position, and after the tube lens body 10 reaches the initial predetermined position, the guide mechanism 600 can be removed.

The lithotripsy mechanism 200 may be placed in the initial predetermined position of the kidney prior to insertion of the scope body 10 or after insertion of the scope body 10. Specifically, the lithotripter 200 can be disposed in the optical fiber channel 14 and extend or retract from the optical fiber channel opening 141 (or the liquid inlet 131).

Then, the flexible portion 1010 is controlled to bend by the operating mechanism 27 of the operating portion 20, so that the liquid inlet 131 and the liquid outlet 121 can be directed toward the stone c at the target position in the renal pelvis p.

In controlling the bending of the flexible portion 1010 by the operating mechanism 27 of the operating portion 20, the flexible portion 1010 can be controlled to be bent at a desired degree of bending according to a target position. As shown in fig. 10A to 10C, when the loop-back calculus removing ureteroscope 100 is used to strike a calculus C located in the suprarenal pelvis, the flexible portion 1010 is controlled to bend at a first bending degree, when the loop-back calculus removing ureteroscope 100 is used to strike a calculus C located in the renal pelvis, the flexible portion 1010 is controlled to bend at a second bending degree, and when the loop-back calculus removing ureteroscope 100 is used to strike a calculus C located in the infrarenal pelvis, the flexible portion 1010 is controlled to bend at a third bending degree, which is greater than the second bending degree and the first bending degree.

The stones c may be struck by the lithotripsy mechanism 200 to strike at least a portion of the stones c into lithotripsy. The lithotripter mechanism 200 can be implemented as the holmium laser.

During or after the stone c is hit by the lithotripsy mechanism 200, fluid may be ejected from the fluid outlet 121 of the loop-back stone removal ureteroscope 100 in a first direction to a target location to impact the stone c. Specifically, fluid may be injected into the injection passage 12 through the injection device 700 connected to the operation portion 20, and the fluid may be injected to a target position to impact crushed stones.

During the process of impacting the broken stone, fluid and the broken stone can be sucked in a negative pressure suction mode, the fluid wrapped with the broken stone is diverted under the effects of negative pressure suction, renal pelvis p recoil and the like, and flows back to the liquid inlet 131 of the ureteroscope 100 for operation capable of discharging the stone in the loop in the second direction. That is, during the process of impacting the crushed stone, the fluid is guided to flow back to the liquid inlet 131 of the ureteroscope 100 in a second direction, wherein a preset included angle is formed between the first direction and the second direction. Specifically, crushed stones and fluid may be sucked by the suction device 800 connected to the operation portion 20 so that the fluid and crushed stones are discharged through the liquid outlet passage 13 to maintain the pressure in the kidney.

In the applied embodiment, the liquid outlet 121 is oriented in a first direction, the liquid inlet 131 is oriented in a second direction, and the fluid can be injected from the liquid outlet 121 to the target position in the renal pelvis p along the liquid injection channel 12 in the first direction directed by the first direction, and can be sucked into the liquid outlet channel 13 of the loop-back calculus removing surgical ureteroscope 100 from the liquid inlet 131 in the second direction directed by the second direction to form a fluid loop.

It should be mentioned that, in the process of striking the calculus c through the calculus-breaking mechanism 200, the tube lens main body 10 can be rotated, so that the calculus-breaking mechanism 200 can strike the calculus in multiple directions, and the fluid emitted from the liquid outlet 121 can impact the calculus comprehensively.

Correspondingly, the application provides a ureteroscope for operation and a working method thereof, wherein the ureteroscope for operation can realize loop-back calculus removal and comprises the following components: step S110, a calculus at a target position is beaten through a calculus smashing mechanism so as to beat at least part of calculus into calculus; s120, discharging fluid to a target position from a fluid outlet of the ureteroscope in a first direction; and S130, guiding the fluid to flow back to the liquid inlet of the ureteroscope in a second direction, wherein a preset included angle is formed between the first direction and the second direction.

In summary, the ureteroscope 100 for operation capable of discharging stones in a loop manner and the working method thereof according to the embodiments of the present application are explained, wherein the liquid outlet and the liquid inlet of the ureteroscope for operation capable of discharging stones in a loop manner have a special posture combination, so that the fluid emitted from the liquid outlet forms a loop in the renal pelvis and then flows back to the liquid inlet.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A ureteroscope for operation capable of discharging stones circularly, which is characterized by comprising:

a tube lens body having a front end portion and a rear end portion; and

wherein, the tube mirror main part includes:

a tube structure body;

at least one liquid injection channel extending within the tubular body from the rear end portion to the front end portion, the at least one liquid injection channel having at least one liquid outlet at the front end portion; and

2. The operable ureteroscope for loop evacuation of stones of claim 1, wherein the angle between the first direction and the second direction is greater than or equal to 90 ° and less than 180 °.

3. The echogenic surgical ureteroscope of claim 2, wherein the fluid inlet is positioned axially forward of the fluid outlet as set by the scope body.

4. The ureteroscope for operation of backroundable calculus removal according to claim 2, wherein the liquid outlet and the liquid inlet are two openings isolated from each other.

5. The ureteroscope for surgery with loop-back calculus removal according to claim 4, wherein the tube structure body has a front end surface and an outer peripheral surface, wherein the liquid outlet is formed on the outer peripheral surface of the tube structure body, and the liquid inlet is formed on the front end surface of the tube structure body.

6. The ureteroscope for operation of annuloplasty ring and calculus removal according to claim 5, wherein an angle between a central axis of the scope body and a central axis of the liquid outlet is greater than 0 ° and equal to or less than 90 °.

7. The ureteroscope for loop-back calculus removal according to claim 5, wherein the front end surface of the tube structure body extends forward from a first side of the outer circumferential surface to a second side opposite to the first side along an axial direction set by the tube diameter body.

8. The circulatable lithagogue surgical ureteroscope of claim 1, wherein the at least one fluid injection channel comprises a first fluid injection channel having a first fluid outlet at the front end portion and a second fluid injection channel having a second fluid outlet at the front end portion.

9. The ureteroscope for operation of looped calculus removal according to claim 8, wherein the outer diameter of the tube structure main body is equal to 4.3 mm, the diameter of the liquid outlet channel is equal to 2.2 mm, and the equivalent diameter of the first liquid injection channel is equal to or larger than 1.2 mm.

10. The circulatable lithagogue surgical ureteroscope of claim 1, wherein the scope body further comprises a fiber channel extending within the tube structure body from the posterior end to the anterior end.

11. The ureteroscope for operation with loop-back calculus removal according to claim 10, wherein the fiber channel is communicated with the liquid outlet channel.

12. The echogenically evacuated surgical ureteroscope according to claim 10, further comprising a lithotripsy mechanism for striking stones, said lithotripsy mechanism being disposed in said fiber optic channel.

13. The circulatable lithagogue surgical ureteroscope of claim 10, further comprising an image acquisition device and a light source mounted to the scope body.